Perhaps you should try some spelling variations:
communication services » telecommunications services
formal communication » informal communication, oral communication, moral communication
des developpements » deux developpements, de developpement, et developpements
developpements en » developpement en, developpement et, developpements de
des variation » does variation, de variation, der variation
services des » services does, services de, service des
does formal » loss formal, does formality, des formalen
typologie » typologies, typology

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: typologie des variation _ does formal communication services des developpements en afrique.*.